Hey fellow Final Fantasy X explorer! When it comes to sphere grid progression, I recommend focusing on each character’s strengths. For example, Tidus is great for agility and speed, so prioritize those nodes for him. Side quests like capturing monsters in the Calm Lands can help you earn powerful items and abilities. Don’t forget to visit Remiem Temple for some challenging battles and sweet rewards. Experiment with different character builds to find what works best for your playstyle – mixing and matching abilities can lead to some powerful combos! Happy exploring!